Sha256: 833b59ac0d04d00e4d76c86cd0fc0280038320c8b543d67be0675b685bd1d7e2
Contents?: true
Size: 826 Bytes
Versions: 7
Compression:
Stored size: 826 Bytes
Contents
class Array
# Rotates an array's elements from back to front n times.
#
# [1,2,3].rotate #=> [3,1,2]
# [3,1,2].rotate #=> [2,3,1]
# [3,1,2].rotate #=> [1,2,3]
# [1,2,3].rotate(3) #=> [1,2,3]
#
# A negative parameter reverses the order from front to back.
#
# [1,2,3].rotate(-1) #=> [2,3,1]
#
# CREDIT: Florian Gross
# CREDIT: Thomas Sawyer
def rotate(n=1)
self.dup.rotate!(n)
end
# Same as #rotate, but acts in place.
#
# a = [1,2,3]
# a.rotate!
# a #=> [3,1,2]
#
# CREDIT: Florian Gross
# CREDIT: Thomas Sawyer
def rotate!(n=1)
n = n.to_int
return self if (n == 0 or self.empty?)
if n > 0
n.abs.times{ self.unshift( self.pop ) }
else
n.abs.times{ self.push( self.shift ) }
end
self
end
end
Version data entries
7 entries across 7 versions & 2 rubygems